860535661 has 2 divisors, whose sum is σ = 860535662. Its totient is φ = 860535660.

The previous prime is 860535629. The next prime is 860535667. The reversal of 860535661 is 166535068.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 725278761 + 135256900 = 26931^2 + 11630^2 .

It is a cyclic number.

It is not a de Polignac number, because 860535661 - 2⁵ = 860535629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (860535667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430267830 + 430267831.

It is an arithmetic number, because the mean of its divisors is an integer number (430267831).

Almost surely, 2^860535661 is an apocalyptic number.

It is an amenable number.

860535661 is a deficient number, since it is larger than the sum of its proper divisors (1).

860535661 is an equidigital number, since it uses as much as digits as its factorization.

860535661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 860535661 is about 29334.8881197798. Note that the first 3 decimals coincide. The cubic root of 860535661 is about 951.1659409318.

The spelling of 860535661 in words is "eight hundred sixty million, five hundred thirty-five thousand, six hundred sixty-one".